Wristwatch



FIG. 1 is a top plan view of a wristwatch showing my new design, the broke line showing of a partial strap is environmental only and forms no part of the claimed design thereof;

FIG. 2 is a front elevational view;

FIG. 3 is a bottom plan view;

FIG. 4 is a rear elevational view;

FIG. 5 is a left side elevational; and,

FIG. 6 is a right side elevational view thereof. 

The ornamental design for a wristwatch, as shown and described. 